Educational device



March 10, 1942. R. a. JoHNsoN EDUCATIONAL DEVICE Filed June' 21, 1938 22 Sheets-Sheet'l INVENTOR ATTORNEY t March 10, 1942. R. B. .loHNsoN EDUCATIONAL DEvIcE" l Filed June 21, 19.158

22 Sheets-Sheet 2 .llllllllllllln t!!! 9* INVENTOR @/W Mw ATTORNEY .um .mi

March 10, 1942 R. B, JOHNSON EDUCTONL 'DEVICE Filed June 2l, 1958 22 Sheets-Sheet 5.

Q; lNvNToR ZY" fm1/w AT'TORNEY Much 1o, 1942. 'R B. JQHNSN EDUCATIONAL DEVICE Filed June 21, 1958 22 Sheets-Sheet 4 v K ww n Y mw. sa E v n.

mvENToR I ATTORNEY v R. B. JOHNSON 2,275,590

' EDUCATIONAL DEVICE Fild June 2l, 1958 22 Sheets-Sheet 5 Q N k INVENTOF v i Y ATTORNEY March 10, 1942.

March 10, 1942'. R. B. JoHNsoN l 'EDUCATIONAL DEVICE Filedk June 21, 1958 22 Sheeis-Sheet 7 WENT-OR? March 10, 1942. R. B. JoHNsoN 2,275,590

EDUCATIONAL DEVI CE Filed June 2l, 1938 22 Sheets-Sheet 8 L ...NL

77 75 79 el s3 o `K @5 5 K lNvENToR ATTORNEY l use March l0, 1942.

R. B. JQHNSON EDUCATIONAL DEVICE Filed June 2l, 1938 22 Sheets-Sheet 9 A'TTORNEY Marh1o,1942. R BJOHNSON I 2,275,590

` EDUCATIONAL DEVICE Filed June 21, 1958 y 22 sheets-sheet 10 FIG. I2.

A'TTORNEY March l0, 1942.

R. B. `JOHNSON EDUCATIONAL DEVICE 22 Sheets-Shet 11 Filed June 2l, 1938 www." "u" ATTORNEY Malrhvmlo, .1942. R B, JOHNSON 2,275,590

EDUCATIONAL DEVICE Filed June 2l, 1938 f 22 Sheets-Sheet l2 INVENTOR' o fff A'TTORNEY FIG. 15.

Mrch l0, 19f2. R. B. JOHNSON EDUCATIONAL DEVICETl 4Filed June 21, 1938 22 Sheets-Sheet l5 '4.5.1.9 L Nn'.

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EDUCATIONAL DEVICE Filed June 2l, 1938 22 SheetS-SheeI 14 j HNTO Ym/ZM ATTORNEY o. N 52 u.

March 10,1942'.

R. B. JOHNSON EDUCATIONAL DEVICE Filed June v2l, 1938 22 Sheets-shewI l 5 FIG. 21.

y INVENTOR ATTORNEY March 10, 1942- R. B. JOHNSON EDUCATIONAL DEVICE Filed June 2l, 1958 22 Sheets-Sheet 16 ATTORNEY March l0, 1942. vR B JOHNSON I 2,275,590

4 EDUCATIONAL DEVICE Filed June 21, 1938 22 Sheets-Sheet 17 rcl'l 10, 1942.- R, 5, JQHNSON' 2,275,590

EDUCATIONAL DEVICE Filed June 2l, 1938 22 Sheets-Shea?l 18 FIG. 23h.

ATTORNEY March-10, 1942. R. B, JOHNSON 2,275,590

EDUCAT IONAL DEVICE Filed June 21, 1938 zzsheets-'sheet 19 ruNTOR y m March 1o, 1942. R. B. JQHNSON 2,275,590

4 EDUCATIONAL DEVICE Filed June '21, 1938 22 Sheets-Shet 2O '32 FIG. 25.

ATTORNEY., 

